Finding the Fourth Proportional to 669.64, 924.12 and 407.68
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Solution
The fourth proportional to 669.64, 924.12 and 407.68 is: 562.61
Step by Step Solution
- Step 1: Write the proportion equation
669.64 : 924.12 = 407.68 : x - Step 2: Convert to fraction form
669.64/924.12 = 407.68/x - Step 3: Cross multiply
669.64x = 924.12 × 407.68 - Step 4: Simplify right side
669.64x = 376,745.24 - Step 5: Solve for x
x = 376,745.24/669.64 - Step 6: Final answer
x = 562.61
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.